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More information on the measure is available at
http://happyflu.com

Please read this carefully before using the data
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BASICS
------
  hf_diffusion contains information about the diffusion tree.
  Each row represents a node, fields are pipe (|) separated.

FIELDS
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  0. uid (int)
    node unique identifier
  1. pid (int)
    parent node identifier
  2. name (str)
    name of the node, as given by the owner
  3. url (str)
    url of the node, as given by the owner
  4. time (unix timestamp)
    date the node was added to the tree
  5. hits (int)
    number of hits on node
  6. ips (int)
    number of unique ips having visited the node
  7. last_hit (unix timestamp)
    date of last hit on the node
  8. first_hit (unix timestamp)
    date of first hit on the node
  9. vid (int)
    unique identifier of the node's owner
  10. country (str)
    country of the node's owner, identified by ip. set to "unknown" when not
    known
  11. others_hits (int)
    number of hits coming from non owners (identified by ip) on the node
  12. owners_hits (int)
    number of hits coming from node owners on the given node
  13. sons (int)
    number of sons in the diffusion tree

IMPORTANT NOTES
---------------
  Fields 0 through 4 consist in the original measure. Fields 5 through 13 are
  mere precalculation of easily obtainable quantities by cross referencing
  information available in hf_activity.

  All fields do not apply to all nodes (i.e. a node with 0 hits doesn't have any
  first or last hits), in that case the field is set to NULL.